Data Sheet

Baseboard connections

The baseboard on the Coral Dev Board provides a variety of connectors as shown in figure 4.

Figure 4. Connectors on the Coral Dev Board

I/O header pinout

All I/O pins on the 40-pin header are powered by the 3.3V power rail, with a programmable impedance of 40-

255ohms, and a max current of ~82mA.

All I/O pins have a 90k pull-down resistor inside the iMX 8M SoC that is used by default during bootup, except for the

I2C pins, which instead have a pull-up to 3.3V on the SoM. However, these can all be changed with a device tree

overlay that loads after bootup.

You can interact with each pin using standard Linux interfaces such as device files (/dev) and sysfs files (/sys). For

usage information, see Connect to the Dev Board I/O pins.

Caution: Do not connect a device that draws more than ~82mA of power or you will brownout the

system.

Version 1.6 (July 2020)